And KPIX has tracked registrations for vehicles with some sort of roof-mounted camera assist back to Apple. (Video via KPIX)

This BMW visit looks like more evidence Apple is doing something with cars, but until the company comments, (and let's be honest; it never does) we won’t know for sure.

It could just be for radio, of course. Apple already lists BMW among its partners for its CarPlay phone connectivity suite, though the software has yet to ship in any of BMW's vehicles fresh from the factory. (Video via Consumer Reports)

It's not exclusive to BMW, either: As Automotive News reported earlier this year, two Ferrari models have incorporated CarPlay right off the line.